Interaction of sodium 4'-(butylamino)azobenzene-4-sulfonate with octyl methyl sulfoxide in adsorbed film and micelle

Fudeko Tanaka, Yuzo Harada, Norihiro Ikeda, Makoto Aratono, Kinsi Motomura

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The surface tension of the aqueous solution of sodium 4'-(butylamino)azobenzene-4-sulfonate (SBAS) and octyl methyl sulfoxide (OMS) mixture was measured as a function of the total molality at various compositions and at 298.15 K under atmospheric pressure. The experimental results were analyzed by applying the thermodynamic relations. The phase diagrams of adsorption and micelle formation were found to suggest that SBAS and OMS molecules interact attractively with each other to form a negative azeotropic mixture in the adsorbed film at a low surface tension and in the micelle. These findings were qualitatively similar to those of the system of SBAS and 2-(octylsulfinyl)ethanol (OSE) and confirmed our conclusion that the strong interaction of dye and nonionic surfactant molecules at the interface may be the one of reasons why a nonionic surfactant acts as the leveling agent in dyeing process.

Original languageEnglish
Pages (from-to)2378-2382
Number of pages5
JournalBulletin of the Chemical Society of Japan
Volume67
Issue number9
Publication statusPublished - Sep 1994

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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